Improvement in the durability of Pt electrocatalysts by coverage with silica layers

Sakae Takenaka; Hiroshi Matsumori; Keizo Nakagawa; Hideki Matsune; Eishi Tanabe; Masahiro Kishida

doi:10.1021/jp076120b

Improvement in the durability of Pt electrocatalysts by coverage with silica layers

Sakae Takenaka, Hiroshi Matsumori, Keizo Nakagawa, Hideki Matsune, Eishi Tanabe, Masahiro Kishida

Molecular and Biochemical Systems Engineering

Research output: Contribution to journal › Article › peer-review

99 Citations (Scopus)

Abstract

Carbon nanotube (CNT)-supported Pt metal nanoparticles were covered with silica layers by utilizing the successive hydrolysis of 3-aminopropyl- triethoxysilane and tetraethoxysilane on CNTs with Pt hydroxide. The CNT-supported Pt metal particles covered with silica layers (denoted as SiO ₂/Pt/CNT) were used as the electrocatalysts. SiO₂/Pt/CNT electrocatalysts showed a high stability for the repeated potential cycling experiment, whereas Pt/CNT electrocatalysts were deactivated seriously for the experiment because of the growth of Pt metal particles in size. The silica layers in SiO₂/Pt/CNT prevent the dissolution of Pt metal particles as well as the migration and agglomeration of Pt metal particles on the supports, which results in the improvement of the stability of Pt/CNT electrocatalysts.

Original language	English
Pages (from-to)	15133-15136
Number of pages	4
Journal	Journal of Physical Chemistry C
Volume	111
Issue number	42
DOIs	https://doi.org/10.1021/jp076120b
Publication status	Published - Oct 25 2007

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/jp076120b

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title = "Improvement in the durability of Pt electrocatalysts by coverage with silica layers",

abstract = "Carbon nanotube (CNT)-supported Pt metal nanoparticles were covered with silica layers by utilizing the successive hydrolysis of 3-aminopropyl- triethoxysilane and tetraethoxysilane on CNTs with Pt hydroxide. The CNT-supported Pt metal particles covered with silica layers (denoted as SiO 2/Pt/CNT) were used as the electrocatalysts. SiO2/Pt/CNT electrocatalysts showed a high stability for the repeated potential cycling experiment, whereas Pt/CNT electrocatalysts were deactivated seriously for the experiment because of the growth of Pt metal particles in size. The silica layers in SiO2/Pt/CNT prevent the dissolution of Pt metal particles as well as the migration and agglomeration of Pt metal particles on the supports, which results in the improvement of the stability of Pt/CNT electrocatalysts.",

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T1 - Improvement in the durability of Pt electrocatalysts by coverage with silica layers

AU - Takenaka, Sakae

AU - Matsumori, Hiroshi

AU - Nakagawa, Keizo

AU - Matsune, Hideki

AU - Tanabe, Eishi

AU - Kishida, Masahiro

PY - 2007/10/25

Y1 - 2007/10/25

N2 - Carbon nanotube (CNT)-supported Pt metal nanoparticles were covered with silica layers by utilizing the successive hydrolysis of 3-aminopropyl- triethoxysilane and tetraethoxysilane on CNTs with Pt hydroxide. The CNT-supported Pt metal particles covered with silica layers (denoted as SiO 2/Pt/CNT) were used as the electrocatalysts. SiO2/Pt/CNT electrocatalysts showed a high stability for the repeated potential cycling experiment, whereas Pt/CNT electrocatalysts were deactivated seriously for the experiment because of the growth of Pt metal particles in size. The silica layers in SiO2/Pt/CNT prevent the dissolution of Pt metal particles as well as the migration and agglomeration of Pt metal particles on the supports, which results in the improvement of the stability of Pt/CNT electrocatalysts.

AB - Carbon nanotube (CNT)-supported Pt metal nanoparticles were covered with silica layers by utilizing the successive hydrolysis of 3-aminopropyl- triethoxysilane and tetraethoxysilane on CNTs with Pt hydroxide. The CNT-supported Pt metal particles covered with silica layers (denoted as SiO 2/Pt/CNT) were used as the electrocatalysts. SiO2/Pt/CNT electrocatalysts showed a high stability for the repeated potential cycling experiment, whereas Pt/CNT electrocatalysts were deactivated seriously for the experiment because of the growth of Pt metal particles in size. The silica layers in SiO2/Pt/CNT prevent the dissolution of Pt metal particles as well as the migration and agglomeration of Pt metal particles on the supports, which results in the improvement of the stability of Pt/CNT electrocatalysts.

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ER -

Improvement in the durability of Pt electrocatalysts by coverage with silica layers

Abstract

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